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Word Frequency Change Watch
x402
Word Frequency Change Watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Monitors a webpage's word frequency and alerts when it changes compared to the previous check, returning changed status and before/after field diffs.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for word frequency: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when word frequency for a page changes. $0.01 per check.
Output
Returns the current word frequency analysis for the page, a boolean indicating whether the data changed since the last call, a list of fields that changed with their before and after values, and the timestamp of when the previous result was last seen. Previous results are retained for 90 days.
Example use cases
Competitor keyword strategy monitoring
“Watch https://competitor.com/products and alert me whenever their word frequency changes — I want to know if they start pushing new keywords or drop existing ones, with before and after counts.”
SEO content drift detection
“Monitor my landing page at https://mysite.com/landing for word frequency changes on a daily schedule — tell me which words shifted and what the values were before and after each change.”
News site topic shift tracking
“Track https://newssite.com/tech and notify me whenever the word frequency changes, so I can see if their editorial focus is shifting toward new topics — include what changed and when it was last seen.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/page/word-freqWhen to prefer
Choose this endpoint when you need scheduled change detection for word frequency specifically — not just a one-time extraction. It is ideal for agents running on a cron-like schedule that need to know only what changed (with diffs) rather than processing raw data themselves. Prefer it over a plain word-frequency check when historical comparison and change alerting are the primary goals.
Side effects
- Invalid or unreachable URL returns an error with no frequency data
- First call for a URL has no previous result to compare against, so changed is false
- Previous result older than 90 days is purged, causing a fresh baseline with no diff
- Payment failure or insufficient USDC balance blocks the check
- Target page returns non-200 status or blocks the crawler, resulting in an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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